Collaborative Research: Integrating Subsurface Processes across Spatial and Temporal Scales - a Holistic Analysis of Vent Fluid Chemistry at the Lau Back-Arc Spreading Center

合作研究：跨空间和时间尺度整合地下过程 - 刘后弧扩散中心喷口流体化学的整体分析

• 批准号: 1038124
• 负责人: Jeffrey Seewald
• 金额: $ 12.77万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1038124&HistoricalAwards=false
• 关键词: Collaborative; Research; Integrating; Subsurface; Processes

Although hydrothermal vent systems have been intensively studied at mid-ocean ridges where ocean crust is being created, few such studies have been carried out in back arc basin spreading systems where crust is being subducted back into the mantle. This research assesses the chemical evolution of hydrothermal activity and its linkages to associated vent biology in one such back arc basin spreading center in the East Lau Basin. A unique series of time series fluid samples that were collected in 2009 will be analyzed for a variety of geochemical and isotopic species, including magmatic volatile species. These data will be combined with temperature measurements to examine the effect of acid volatiles on the evolution of hydrothermal systems overlying silicic magmas and how this influences the mobilization of metals. It will also be used to examine the role of seawater circulation in the ocean crust and its impact on the removal of CO2 via mineral precipitation. Broader impacts of the work include the support of an early career scientist, involvement of faculty and undergraduates from a college that serves economically struggling urban centers in southeastern Massachusetts, and engaging undergraduates involved in local summer sea-going programs. Hands-on learning modules for K-8 students will be created.

虽然对洋中脊的热液喷口系统进行了深入的研究，而洋中脊是洋壳形成的地方，但对弧后盆地扩张系统进行的研究却很少，而弧后盆地扩张系统是洋壳向地幔俯冲的地方。 本研究评估了热液活动的化学演化及其与东劳盆地弧后盆地扩张中心的相关喷口生物的联系。 将对2009年收集的一系列独特的时间序列流体样品进行分析，以确定各种地球化学和同位素物种，包括岩浆挥发性物种。 这些数据将与温度测量相结合，以研究酸挥发物对上覆岩浆的热液系统演变的影响，以及这如何影响金属的流动。 它还将用于研究海洋地壳中海水循环的作用及其对通过矿物沉淀去除二氧化碳的影响。 这项工作的更广泛影响包括一位早期职业科学家的支持，来自一所为马萨诸塞州东南部经济困难的城市中心服务的大学的教师和本科生的参与，以及参与当地夏季航海项目的本科生。 将为K-8学生创建实践学习模块。